Seat and back rest for a chair



FIG. 1 is a perspective view showing the top, left side and front of a chair having the seat and back rest which form my new design, the broken lines of other parts of the chair in this and other figures being for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a rear elevational view thereof.

The short broken lines shown on the seat and back rest along seam lines in FIGS. 1 through 6 are understood to represent stitching. 

The ornamental design for a seat and back rest for a chair, as shown and described. 